Wireman theory sem 2 july 2017

july 2017 sem 2 wireman theory
Which of the following instrument can be used to measure only DC?
(a) M-C. instrument (b) M.I. instrument
(c) Induction t>pe instrument (d) None of these

The internal resistance of an ammeter is —
(a) Zero (b) Very low (c) Very high (d) Infinite

The moving iron type voltmeter and ammeter are suitable to measure the potential Difference and current in ..............
(a) A.C. circuit only (b) D.C. circuit only (c) Both (a) & (b) (d) None of these